70 CYTOLOGY [BoT. Absts., Vol. X, 



435. Howard, W. L. Coordination in teaching horticulture. Proc. Amer. Sec. Hort. 

 Sci. 16: 151-154. 1919 [1920]. — The author discusses the necessity of coordination in agri- 

 cultural teaching and the advisability of teaching the sciences from an agricultural point of 

 view and the agricultural subjects in their scientific relationship. This obviously necessitates 

 cooperation between the scientific and technical departments, especially in station projects. 

 It is believed that by judicious coordination of subjects and hearty cooperation of colleges, 

 departments, and individuals, much more can be done and done more rapidly. — H. W . Rickey. 



436. Merrill, F. A. How teachers may use Farmers' Bulletin 1125: Forage for the cotton 

 belt. U. S. Dept. Agric. Dept. Circ. 158. S p. 1921. 



437. Merrill, F. A. How teachers may use Farmers' Bulletin 1148: Cowpeas: culture 

 and varieties. U. S. Dept. Agric. Dept. Circ. 157. 8 p. 1921. 



438. Merrill, F. A. How teachers may use Farmers' Bulletin 1175: Better seed corn. 

 U. S. Dept. Agric. Dept. Circ. 15G. 6 p. 1921. 



439. MoRSTATT, H. Zur Ausbildung fiir den Pflanzenschutzdienst. [Training for plant 

 pathological service.] Zeitschr. Pflanzenkrankh. 31: 89-94. 1921. — The author discusses the 

 principles relative to training for plant pathological service. — //. T. Gilssow. 



440. Percival, John. Agricultural botany. 6th ed. Duckworth & Co.: London, 1921. 



441. ScHMiTT, Cornel. Bilder aus dem Pflanzenleben. Botanische Plaudereien. [Pic- 

 tures from the plant world. Botanical talks.] IIS p. F. P. Datterer & Cie.: Freising, Ger- 

 many. 1 mark, 50 pf. 



442. ScHMiTT, Cornel. Der biologische Schulgarten, seine Anlage und unterrichtliche 

 Verwertung. (The biological school garden, its plan and value for instruction.] 2nd ed., 112 p. 

 F. P. Datterer & Cie.: Freising, Germany. 1 mark, 70 pf. 



443. ScHOPMEYER, C. H. How teachers may use Farmers' Bulletin 1087: Beautifying the 

 home grounds. U. S. Dept. Agric. Circ. 155. 6 p. 1921. 



CYTOLOGY 



G. M. Smith, Editor 

 G. S. Bryan, Assistant Editor 



(See also in this issue Entries 530, 595, 596, 743, 77l) 



444. Beauverie, J. La resistance plastidaire et mitochondriale et la parasitisme. [Plas- 

 tid and mitochondrial resistance and parasitism.] Compt. Rend. Acad. Sci. Paris 172: 

 1195-1198. 1921. — Saponin applied to tissues containing plastids and mitochondria causes a 

 degeneration by vacuolization. Resistance to degeneration varies with age and with the 

 tissue concerned. This is particularly marked in the chromoplasts of Ranunculus Ficariae. 

 The same effect is produced by infection with Uromyces Ficariae. The bearing of this on 

 parasitism and plant pathology is not yet apparent. — C. H. Farr. 



445. Dangeard, Pierre. L'evolution des grains d'aleurone en vacuoles ordinaires et la 

 formation des tannins. (The development of the grains of aleurone in ordinary vacuoles and the 

 formation of tannin.] Compt. Rend. Acad. Sci. Paris 172: 995-997. Fig. A-I. 1921.— A 

 study of the tannin formation in the epidermis of the leaves of Taxus baccata and the aleurone 

 grains and tannin in seedlings of Pinus maritima is reported. Tannin is found to be of vacu- 

 olar origin and not mitochondrial, as Politis contends. The aleurone and tannin are both 

 found associated with the vacuolar system in the pine. — C. H. Farr. 



